Increase fines to a point where the estimated prosecution rate makes the expected value of breaking the law negative.

Directly punish executives, upper management, board members and large shareholders when their companies break the law rather than just fining the company. This could include fines, prohibitions from holding similar positions, and jail time.

Stop commoditizing ownership by prohibiting ownership of companies by non-participants. This last one would have the largest impact but is the least likely.